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Section 2: Stoichiometric Calculations

Stoichiometric Calculations

1.

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Based on the following equation, how many moles of hydrochloric acid are needed to react with 0.64 moles of potassium permanganate?
2KMnO4 + 8 HCl → 3 Cl2 + 2 MnO2 + 4 H2O + 2KCl
A)0.21 mol HCl
B)0.64 mol HCl
C)2.7 mol HCl
D)5.1 mol HCl
2.
If sufficient hydrochloric acid is used to react completely with 48.6 g of magnesium, how much hydrogen will be produced?
2HCl + Mg → MgCl2 + H2
A)3 g
B)2 mol
C)1 mol
D)6 g
3.
What mass of SrF2 can be prepared from the reaction of 10.0 g Sr(OH)2 with excess HF?
Sr(OH)2 + 2HF → SrF2 + 2H2O
A)9.67 g
B)9.82 g
C)10.0 g
D)10.3 g
4.
How many moles of sulfur are present in 5 moles of H2SO4?
A)1 mol
B)2 mol
C)5 mol
D)10 mol
5.
Balance the following equation with the smallest whole—number coefficients. How many grams of O2 will be produced if 23.2 g of XeF2 reacts with excess water?
XeF2 + H2O → Xe + HF + O2
A)2.19 g
B)1.10 g
C)3.31 g
D)4.42 g
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